Mighty Mule MM571W
#1 in Single swingFull review
A heavy duty single gate kit for long or heavy farm and estate gates that wants a UL 325 listing. Check the length and weight chart for gates over 8 ft.
Amazon $443.04$443.04
The Mighty Mule MM571W rates 3.6 among single swing automatic gate openers; the TOPENS XD852 rates 3.0 among dual swing ones. The Mighty Mule MM571W costs $255.96 less ($443.04 vs $699).
Prices were last checked November 11, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
TOPENS XD852
#7 in Dual swingFull review
A smart dual kit for heavy paired gates near the house, where app control matters more than a safety listing.
Amazon $699$699
Scores side by side
These two sit in different gate type classes (single swing and dual swing), and each is scored against the reference points for its own class, so a rating says how well each does among its own gate type peers. How we rank explains each factor.
| Factor weight | Mighty Mule MM571W | TOPENS XD852 |
|---|---|---|
| Overall rating | 3.6/5 | 3.0/5 |
| Gate weight 20% | 87 gates up to 850 lb per leaf | 89 gates up to 880 lb per leaf |
| Gate length 15% | 80 gates up to 18 ft per leaf | 80 gates up to 18 ft per leaf |
| Safety listing 15% | 100 UL 325 listed | 0 no UL 325 listing published, scored as none |
| Price 25% | 55 $443.04 | 47 $699 |
| Warranty 25% | 12 1.5-year warranty | 0 1-year warranty |
Specifications
| Mighty Mule MM571W | TOPENS XD852 | |
|---|---|---|
| Gate | ||
| Gate type | Single swing | Dual swing |
| Heaviest gate | 850 lb | 880 lb |
| Longest gate | 18 ft | 18 ft |
| Time to open | 14 s | 15 s |
| UL 325 listed | Yes | - |
| Power | ||
| Power | Battery, solar ready | Battery, solar ready |
| Battery | 7 Ah | - |
| Motor voltage | 12 V | 24 V |
| Build | ||
| Remotes included | 1 | 2 |
| Weight | 30 lb | 33.2 lb |
| Warranty | 1.5 years | 1 year |
| Released | - | 2025-05 |